Improvement in horse-powers



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AM. PHOTO-LITHQ. CD. N-Y. (OSBURN E'S PROCESS) 'UNITED STATES ATENT OFFICE..

I). W. HUNT, OF SAN FRANCISCO, CALIFORNIA.

IMPROVEMENT IN HORSE- POWERS.

Specification forming part of Letters Patent No. fh), dated May 23,1865.

. afull, clear, and exact description ofthe same,

reference being had to the accompanying drawings, making a 'pa-rt of this s; ecitication, in which- Figure 1 is a side sectional view of my invention, taken in the line a: fr, Fig. 2 5 Fig. 2, a plan or top view of the same; Fig. 3, an enlarged longitudinal vertical section of' two links of the chain pertaining to the same; Fig. 4., a transverseA vertical section of the same, taken in theV line, y y, Fig. 3, Fig. 5, a detached and diminished side view of a brake pertaining to the same.

Similar letters of reference indicate corresponding parts in the several figures.

This invention relates, first, to a novel and useful means elnployed for regulating the speed of the horse-power, whereby a steady and uniform motion ofthe same is obtained by an automatic mechanism. This speed-regulating mechanism consists of a ball-governor, combined with a brake, the latter beingarranged to operate against the balance or ily wheel of the machine, as hereinafter fully set forth.

The invention relates, second, to a new and useful improvement inV the construction of the endless platform, whereby the same is rendered rigid or inexible in one direction-to wit, downward-underthedownwardpressure due to the weight of the animal, and at the same time rendered flexible inthe 'other or opposite direction, and the use of rollers in the platform dispensed with, the platform being allowed to work on rollers and with much less friction than the ordinary platform in use.

The invention relates, third, to a brake at tachment for stopping the machine in case the belt of the same should break-a contingency of frequent occurrence, and which is liable to injure either the horse or the machine.

The invention relates, fourth, to an improved meansfor giving the machine, and consequently the endless platform, a greater or less degree of inclination as may be required.

The invention relates, fifth, to the manner of hanging the machine, whereby the adjustment above mentionedmay be made without affecting the belt by which motion is trans- 4 mitted -from the machine to the machinery Vto be driven.

To enable those skilled in the art to fully understand and construct my invention, I will proceed to describe it.

A represents the frame of the machine,whieh may be constructed of c'astiron, and having its upper bars, c a, somewhat inclined, as shown in Fig. l.

B B are two shafts, which are placed transversely in the'upper part of the frame A, and

have drums C C' placed on them, over `which an endless platform, D, works.

B is a shaft at the most depressed end of the upper inclined part of the frame A, and it has a balance or fly wheel, E, upon it at one end, and a pulley, F, at the opposite end, and the shaft B'has apulley, G', at one end, around which and the pulley Fof shaft Dll abelt, EI, passes. a smaller pulley, I, upon it.

J vrepresents a ball-governor, which may be constructed in the usual way, and is placed within the frame A and endless platform D,

as shown clearly in Fig. l. This governor is rotated from the pulley I` of the shaft B by means of a belt or rope, K, the latter passing around guide-pulleys p p at one side of the frame A, as shown in Fig. 2. The slide c of' the governor J is connected with an arm, L, which is attached to a shaft, M', in the lower part of the frame A, one end of said shaft M being connected by an arm, (1with the ful crumpin e ofa toggle M, the outer end of one arm f, of which Ais attached to the frame A, as shown at g, the outer end of the, other arm f' being, connected to a curved bar, N, which is suspended at its upper end from a horizontal shaft, h, on the framing, and has a shoe, 0, attached to it to bear against the periphery ofthe balance or iiy wheelE. This toggle and shoe form a, brake, which is operated through the medium of the governor as follows:

The endless platform D is actuated by the horse in the usual way, and when the motion or speed of the platform becomes too great the slide c of the governor, which is raised on the governorshaft by thewspreading or forcing out of the balls t' under centrifugal force, will turn the shaft M, and the arm d will actu- The opposite end ofthe shaft B has ate the toggle M, so that the shoe O will be pressed against the balance on fly wheel E andthe speed of the machine checked. By this arrangement a very simple and perfect automatic speed-regulatin g device is obtained, one not liable to get out of repair or become deranged by use.

The endless platform D is constructed of two endless chains, P P, formed each of a series of links, j, of castiron, having longitudi` nal grooves 7c in their under sides extending their whole length. These links are connected together by wrought-iron plates l, which are iitted in the grooves 7c and secured to the links by rivets on, as shown clearly in Fig. 3, the ends of the platesl being rounded at their inner sides, as shown at n, to admit of the bending of the links j in the direction indicated by the arrows in Fig. 3. The links j are cast with flanges or lips 0 at their ends, to form good bearing-surfaces to prevent the bending of the links in the opposite direction. To the outer surfaces of the links j wooden slats p are attached by bolts g.

The chains P P work over the drums C C of the shafts B B, and the upper part of the endless platform between the drums C C is supported by frictionrollers i", which are placed on shafts s, the journals of the latter having their bearings in the bars al a of the frame A, the links j and plates Z resting on said rollers.

By this mode of construction a very durable and strong endless platform is obtained, one which will operate with but little friction, be perfectly flexible in one direction so as to be capable of turningfreely around the drums C C', and be rigid in the opposite direction, so as to present a rm bearing and foot-hold to the horse. No friction-rollers are required to be attached to the endless platform, the latter being simply supported at its upper part by rollers in the frame A underneath, where the animal stands.

The belt H has an idle-pulley, Q, resting upon it, as shown in Fig. 5. This pulley Qis iitted in one end of a lever, R, the fulcrumpin t of which passes into one side ofthe frame A, the short arm u of said lever being in line with the periphery of the pulley G.

S is a shoe, the lower end of which is attached by a pin or bolt, 0, to the frame A. This shoe S passes up between the pulley G and the short arm u of the lever B, and in consequence of the pulley Q, resting upon the belt H the short arm u of the lever B is kept free from the shoe S, but in case the belt H should break or be casually cast off from the pulley G or I*` the long arm u of the lever It will fall, and by its gravity will cause the. short arm u to press the shoe S sufficiently hard against the pulley G to stop the machine.

Thus by this simple arrangement an automatic stop is obtained in case of the breaking or disarrangement of the belt H. The frame Aof the machine restsin asupplemental frame T, of rectangular form. The lowest end of the frame A rests directly on the frame T, but the opposite end rests on two cams, ww, placed on a shaft, V, which is placed transversely in the frame T. One end of this shaft has a wheel, V, attached toit, the periphery of which is perforated with holes a', into any one of which a pawl, W, catches, said pawl being at- .tached to one side of the frame A. (See Fig. 2.)

By turning the shaft Vit will be seen that the cams w w will raise and lower the front end of the machine, and that a greater orless degree of inclination may be given the endless platform D, as required, by thus adjusting the cams fw, the latter being retained at any desired point by the pawl W. In this adjustment of the frame A the latter turns on journals b b, which are attached to the side of the frame A, and rest in bearings ax on the frame T directly underneath the shaft B', on which the balance or fly E is placed. By this arrangement the beltl which passes around the wheel-E, and from which the power is taken, will not be affected by the adjustment of the frame A, as the shaft B is near the center of lnotion of the machine.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The ball-governor J, in combination with the toggle M and shoe O, the latter being attached to a swinging bar, N, or its equivalent, and placed in relation with the balancewheel E, all being arranged and applied to a horsepower, substantially as and for the purpose herein set forth.

2. The endless platform D, provided with chains P P, constructed of cast-iron links j, having longitudinal grooves 7c to receive plates l, which are attached to thelinks by rivets m, substantially as herein set forth.

3. The brake or stop attachment composed of a pulley, Q, bearing on the belt H and attached to the lever R,in combination with the shoe S, interposed between the short arm u of saidlever and the pulley G, to operate in the manner substantially as and for the purpose herein set forth.

4. The cams w w on the shaft V in the supplemental frame T, in connection with the pawl W and the perforated wheel V, or its equivalent, for adjusting the inclination of the frame Aand endless platform D, substantially as described.

5. Hanging the frame A in the supplemental frame T by means of journals b b', attached to the sides of the frame A underneath and in line with the balance-wheel sh aft B", substantially as and for the purpose herein set forth. 

